26 lines
637 B
Kotlin
26 lines
637 B
Kotlin
/**
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* Example:
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* var ti = TreeNode(5)
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* var v = ti.`val`
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* Definition for a binary tree node.
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* class TreeNode(var `val`: Int) {
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* var left: TreeNode? = null
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* var right: TreeNode? = null
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* }
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*/
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class Solution {
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fun inorderTraversal(root: TreeNode?, values: MutableList<Int>): List<Int> {
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if (root == null) {
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return values
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}
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inorderTraversal(root.left, values)
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values.add(root.`val`!!)
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inorderTraversal(root.right, values)
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return values
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}
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fun inorderTraversal(root: TreeNode?): List<Int>
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= inorderTraversal(root, mutableListOf<Int>())
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}
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